wow thanks a lot anbu23!!!!!

now iam facing another problem

ok for example i need to grep only the transaction of 14th hour i will do this:

cut -d':' -f1 filename|grep "14"

it will show:
211 61 2007-06-26 14
211 61 2007-06-26 14
211 61 2007-06-26 14
211 61 2007-06-26 14


now what if i need to see the files which are of 00 hour??

cut -d':' -f1 filename|grep "00"

if i do this it will show all the files because 2007 also has two zeros.